Ddclient is a Perl client used to update dynamic DNS entries for accounts on
Dynamic DNS Network Services' free DNS service.
DDclient is a small but full featured client requiring only Perl and no
additional modules. It runs under most UNIX OSes and has been tested under
GNU/Linux and FreeBSD. Supported features include: operating as a daemon,
manual and automatic updates, static and dynamic updates, optimized updates
for multiple addresses, MX, wildcards, abuse avoidance, retrying failed
updates, and sending update status to syslog and through e-mail.